Core, Junction, and VRAM temperature reader for Linux + GDDR6/GDDR6X GPUs

Warning: This repo is experimental and may not work as intended. The code is provided as-is without any warranty of any kind. If you have a problem, please open an issue!

Quickstart

Assuming you have libpci and cuda, you can directly build and run the project like this:

curl -sO https://raw.githubusercontent.com/ThomasBaruzier/gddr6-core-junction-vram-temps/refs/heads/main/gputemps.c && gcc gputemps.c -o gputemps -O3 -lnvidia-ml -lpci -I"$CUDA_HOME/targets/x86_64-linux/include" && sudo ./gputemps

If you don't have the dependencies, you can use Docker for the build (will download cuda):

git clone https://github.com/ThomasBaruzier/gddr6-core-junction-vram-temps && cd gddr6-core-junction-vram-temps && ./build-docker.sh && sudo ./gputemps

If this didn't work, please continue reading

Dependencies

• libpci-dev

sudo apt install libpci-dev

• cuda

sudo apt install nvidia-cuda-toolkit

Building

gcc gputemps.c -o gputemps -O3 -lnvidia-ml -lpci

If you get the error nvml.h: No such file or directory, try adding -I/path/to/cuda/targets/x86_64-linux/include

Executing

sudo ./gputemps

Press any key or CTRL+C to exit

Troubleshooting (in case of mmap error)

• The following kernel boot parameter should be used: iomem=relaxed

sudo nano /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash iomem=relaxed"
sudo update-grub
sudo reboot

• Disabling Secure Boot

This can be done in the UEFI/BIOS configuration or using mokutil:

mokutil --disable-validation

Check state with:

$ sudo mokutil --sb
SecureBoot disabled

Tested and working

• RTX 3090 (GA102)
• RTX 4060 Ti 16GB (AD106)
• RTX 4060 Max-Q (AD107)

Should be working

• RTX 4090 (AD102)
• RTX 4080 Super (AD103)
• RTX 4080 (AD103)
• RTX 4070 Ti Super (AD103)
• RTX 4070 Ti (AD104)
• RTX 4070 Super (AD104)
• RTX 4070 (AD104)
• RTX 3090 Ti (GA102)
• RTX 3080 Ti (GA102)
• RTX 3080 (GA102)
• RTX 3080 LHR (GA102)
• RTX A2000 (GA106)
• RTX A4500 (GA102)
• RTX A5000 (GA102)
• RTX A6000 (AD102)
• L4 (AD104)
• L40S (AD102)
• A10 (GA102)

Not working

• RTX 3070 (GA104)
• RTX 3070 LHR (GA104)
• Any other card not listed above

Credits

• https://github.com/jjziets/gddr6_temps: For showing me how to get VRAM and Junction temps
• https://github.com/olealgoritme/gddr6: For pioneering the method to access undocumented GPU registers, and this README